Wi-Fi 6 (802.1ax) is being replaced by Wi-Fi 6E (Extended). It is built on the existing Wi-Fi 6 standard. Wi-Fi 6E offers the same advanced features of Wi-Fi 6 and allows access to a new 6GHz band. In other words, Wi-Fi 6E is the same as Wi-Fi 6 with additional lanes on an expressway for faster traffic. Wi-Fi 6E might be the most significant development on Wi-Fi technology in recent years.
https://www.juniper.net/us/en/products-services/what-is/wi-fi-6e/